Second seed Naomi Osaka benefited from a walkover after Nina Stojanovic withdrew ahead of Sunday's clash due to a right thigh injury.
Ash Barty and Victoria Azarenka both advanced on Saturday as Simona Halep succumbed to injury.
Simona Halep menarik diri daripada Kejohanan Tenis Terbuka Miami kerana kecederaan bahu.
Two-time grand slam champion Simona Halep pulled out of the Miami Open on Saturday due to an issue with her right shoulder.
Second seed Naomi Osaka won her first match since lifting the Australian Open title, while runner-up Jennifer Brady lost again.
Pemain pilihan kedua, Naomi Osaka, meneruskan prestasi cemerlangnya ketika memenangi kejuaraan pertamanya dalam Terbuka Australia bulan lalu.
Reigning Miami Open champion Ashleigh Barty fended off a match point to win in three sets against Kristina Kucova.
Sloane Stephens had lost in the first round in Monterrey and Melbourne earlier this year but won in Miami on Wednesday.
Zarina Diyas got the better of "legend" Venus Williams at the Miami Open, while there were wins for Shelby Rogers and Ajla Tomljanovic.
Leylah Fernandez, 18 broke through for her first trophy with a 6-1 6-4 victory over qualifier Viktorija Golubic on Sunday.